Nisar Muhammad, Thue Pascal S, Maghous Myriam B, Geshev Julian, Lima Eder C, Einloft Sandra
Programa de Pós-Graduação em Engenharia e Tecnologia de Materiais (PGETEMA), Pontifical Catholic University of Rio Grande do Sul (PUCRS) Porto Alegre Brazil
Institute of Chemistry - Federal University of Rio Grande do Sul (UFRGS) Av. Bento Gonçalves 9500 Porto Alegre RS Brazil.
RSC Adv. 2020 Sep 18;10(57):34595-34604. doi: 10.1039/d0ra06805e. eCollection 2020 Sep 16.
In the present study, polysulfone (PSF)-activated carbon nanocomposites were synthesized by a melt mixing technique. Here, 2 wt% activated carbon (CA, CA-Ni, and CA-Co) was used as filler, and effects on thermal, mechanical, magnetic, morphological, and carbon dioxide capture properties were studied. The pyrolysis of wood sawdust produced carbon materials activated by Co and/or Ni salt. The thermal degradation and the amount of metal in the carbon materials were investigated by thermogravimetric analysis. The maximum degradation temperature showed an improvement of up to 3 °C, while the initial degradation temperature decreased up to 4 °C with the addition of metal-activated carbons. The values of estimated by differential scanning calorimetry appear to be practically identical for pure PSF and its nanocomposites. The elasticity modulus of the nanocomposite shows an enhancement of 17% concerning the neat PSF. The water contact angle showed a decrease with the incorporation of the fillers, indicating the hydrophilic nature of the composite. The carbon dioxide sorption capacity of the nanocomposite showed an enhancement of almost 10% in contrast to neat PSF. Ferromagnetic behavior of the thermoplastic nanocomposite was observed with the introduction of 2.0 wt% metal-carbonized filler. The exceptional magnetic properties, for a thermoplastic material such as polysulfone, make it promising for various industrial applications.
在本研究中，采用熔融混合技术合成了聚砜（PSF）-活性炭纳米复合材料。在此，使用2 wt%的活性炭（CA、CA-Ni和CA-Co）作为填料，并研究了其对热、机械、磁性、形态和二氧化碳捕获性能的影响。木屑的热解产生了由钴和/或镍盐活化的碳材料。通过热重分析研究了碳材料的热降解和金属含量。添加金属活化碳后，最大降解温度提高了3℃，而初始降解温度降低了4℃。通过差示扫描量热法估算的值对于纯PSF及其纳米复合材料似乎几乎相同。纳米复合材料的弹性模量相对于纯PSF提高了17%。随着填料的加入，水接触角减小，表明复合材料具有亲水性。与纯PSF相比，纳米复合材料的二氧化碳吸附容量提高了近10%。引入2.0 wt%的金属碳化填料后，观察到热塑性纳米复合材料具有铁磁行为。对于聚砜这样的热塑性材料而言，其优异的磁性使其在各种工业应用中具有广阔前景。
